THERMOFLOW SOLDER Sn60/Pb40, 1.0mm, 1 LB Sn60/Pb40 Ratio - 1.0mm Diameter - MC20A Flux Type - 2% Flux Meets RoHS directives when combined with a lead free alloy. Rosin based flux that is suitable for Lead Free and Tin- Lead based solder Suitable for temperatures ranges of 572-752 degrees Fahrenheit Order is for 1 (one) Pound Roll